Etymology and distribution of 一文字.

Ichimonji 【一文字】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

Shizuoka-ken , Fukuoka-ken , Miyagi-ken .

① Shizuoka-ken Shizuoka-shi Birth of Iharahara-cho, Shimizu-ku. A place name with a record since the Warring States Period. The place name was also written as "Lohu."

② 井原 's variant. Origin of Shimane-ken Oochi-gun Oonan-chou Ihara (Ihara). A place name with a record since the Warring States Period. It changed from Ihara 's surname in the Edo period.